I have resolved this problem with @Version attribute. Those who are interested
in knowing here is how i did it:
The counter entity bean is modified as follows:
| @Entity
| @Table(name = "counter")
| public class Counter implements Serializable{
|
| private String counterName;
|
| private long value;
|
| private int version;
|
| @Id
| public String getCounterName() {
| return counterName;
| }
|
| public void setCounterName(String name) {
| this.counterName = name;
| }
|
| public long getValue() {
| return value;
| }
|
| public void setValue(long value) {
| this.value = value;
| }
|
| @Version
| public int getVersion() {
| return version;
| }
|
| public void setVersion(int version) {
| this.version = version;
| }
| }
|
The update method is modified as follows:
| public long count(){
|
| Counter counter = manager.find(Counter.class, "methodA");
| manager.lock(counter, LockModeType.READ);
| if(counter==null)
| {
| counter = new Counter();
| counter.setCounterName(tableName);
| counter.setValue(1);
| manager.persist(counter);
| }
|
| long returnValue = counter.getValue();
| key.setNextKey(returnValue+1);
| manager.merge(counter);
| manager.flush();
| return returnValue;
| }
|
Murtuza
View the original post :
http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3995219#3995219
Reply to the post :
http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3995219
_______________________________________________
jboss-user mailing list
[email protected]
https://lists.jboss.org/mailman/listinfo/jboss-user
